The programs that generate the charts were originally written by User_debr5836 debr5836∞ (aka debr), and has continued to be revised and adapted to new games by User_tma tma∞. The programs parse the original game files to determine the note position and star power phrase locations, along with tempo, time signatures, and section names. Specifics of the game file formats is beyond the scope of this wiki page and is discussed further on the GuitarHeroFileFormats page.

The name "SlowHero" was originally a joke referencing the general slowness at the time of the ScoreHero site, before the hardware upgrades and database optimisations during 2007/2008.